A. Verify that the network command under router BGP is configured correct on each router for announcing the router's loopback interface in BGP

B. Verify that the ibgp-multihop command under the BGP neighbor is configured correctly on each router

C. Verify that the loopback interfaces are reachable over the IGP

D. Verify that the update-source loopback command under the BGP neighbor is configured correctly on each router

E. Verify that the ttl-security command under the BGP neighbor is configured correctly on each router to enable the router to send the BGP packets using a proper TTL value

F. Verify that the UDP port 179 traffic is not being blocked by an ACL or firewall between the two IBGP peers